<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div class="play-ground">
        <div class="ball"></div>
    </div>
    <style>
        .play-ground{
            width: 600px;
            height: 300px;
            border: 1px solid red ;
        }
        .ball{
            background-color: rgb(5, 121, 230);
            border-radius: 50%;
            position: absolute;
            animation: ball 7s infinite;
        }
        @keyframes ball{
            from{
                width: 50px;
                height: 50px;
                left: 30px;
                top: 120px;
            }
            25%{
                width: 25px;
                height: 25px;
                left: 130px;
                top: 20px;
            }
            50%{
                width: 100px;
                height: 100px;
                left: 240px;
                top: 100px;
            }
            75%{
                width:50px ;
                height: 50px;
                left: 360px;
                top: 200px;
            }
            100%{
                width: 150px;
                height: 150px;
                left: 420px;
                top: 70px;
            }
        }

    </style>
</body>
</html>